Fix dev version package spec in requirements.txt
Fix dev version package spec in requirements.txt

'-' in #egg section is treated like a separator,
inside egg_info, which is not desirable.

Change-Id: Ic857b45a99614c96a245e158936220dea557db7c

NeCTAR-RC/murano,satish-avninetworks/murano,sajuptpm/murano,DavidPurcell/murano_temp,NeCTAR-RC/murano,openstack/murano,NeCTAR-RC/murano,sajuptpm/murano,DavidPurcell/murano_temp,chenyujie/hybrid-murano,ativelkov/murano-api,olivierlemasle/murano,DavidPurcell/murano_temp,telefonicaid/murano,ativelkov/murano-api,olivierlemasle/murano,satish-avninetworks/murano,openstack/murano,satish-avninetworks/murano,sergmelikyan/murano,satish-avninetworks/murano,NeCTAR-RC/murano,sergmelikyan/murano,DavidPurcell/murano_temp,chenyujie/hybrid-murano,olivierlemasle/murano,olivierlemasle/murano,telefonicaid/murano